Method of making embossed printing



press is then allowed to print on the blanket Patented May 11, 1926, v

I UNITED STATES. A

ARTHUR L. SMITH, or

-METHOD or MAKING EMBOSSED rnrlv'rnvcr.

No Drawing.

The method of embossing the work and making the die is substantially as follows:

The work or letterheads to be embossed are first printed in the usual manner. The

or draw sheet after which a sheet of the same size as the printed work is put in the press and printed. This sheet will therefore have printing on its face anda printed reverse on its back face, both of said printings being exactly aligned. This procedure is repeated until the requisite number of sheets have been printed, say five sheets, though the number of sheets necessary will depend on the height of the embossing desired, as will presently appear. These sheets, with printing on the face and back, are then sprinkled on both sides with a powder comprising resin and damar, the powder adhering to the wet ink. The powdered paper is then heated, whereupon the powder particles melt and coalesce. Immediately on cooling to normal temperature the coalesced powdered material hardens. One of these sheets is then pasted to the platen of the press and a blotter is glued to a suitable metal base in the press. An impression is then pulled. The impression in the blotter, while not very deep, can be distinctly seen. The second of the prepared sheets (the powdered sheets) then pasted directly over the first sheets and an impression again pulled. The impression in the blotter will be more pronounced than before. If additional depth of the impression is desired, then additional sheets, prepared as stated, are pasted on top of the sheets already in the press. The blotter and powe dered paper constitute the embossing dies. The previously printed work is now run through the die, it being understood that the printing on the paper will be properly alignedwith the die.

printing without the use of Application filed December 7, 1 923.. Serial iNo. 679,272.

NTIoFFicE.

ST. PAUL, MINNESOTA. Y

The powder, while preferably of the composition indicated, may be ofother suitable material. The blotter is preferably of the kind known as l lOpound plainblotter.

By making the dies in the manner indiw cated, the cost of embossed work is very greatly reduced because of the elimination of the expensive metal dies heretofore used.

The -method of making the dies is very sims ple and can-be made'in the ordinary printing sho r Having thus described my invention, what I claim as new and desire to secure byLette'rs Patent is: v 1

' 1. Themethod, of making embossing dies which-consists in printing on the blanketof a press, placing a sheet of paper in the press and printing the same, coating the wet inkon the sheet with a powder which will harden, and forming the female die from a blotter v into which thehardened powder on said sheet has been impressed. I

p 2. The method of making a male die which consists in forming a raised surface on one side of a sheet of paper, said raised surface corresponding to the matter to be embossed,

forming on the. back of said sheet of paper a similar raised portion but which is in the reverse, said raised portions being in exact alignment, said raised port-ions being obtained by printing on both sides of the sheet and applying to the ink while wet a powder which will coalesce on the application of heat and harden at normal temperature.

3. Embossing dies. comprising as the female die a sheet of blotting paper, the male die comprising a sheet of paper having a raised portion on both of its faces corresponding to the matter to be embossed, said raised. portion consisting ofa material adapted to soften in the presence of heat and harden at normal temperature.

4. The method of preparing dies for use in embossing consisting in making a printing impression on the blanket of a press, placing a sheet of paper within the press having printing thereon whereby both sides of the paper will receive a printing -impres sion, sprinkling both sides of the sheet while the ink is wet with powder which will soften and coalesce on the application of heat, and harden at normal temperatures placing said sheet in a press and making an lmpression the first sheet and making a further impression in said vblotter, the embossing of the work beingdone by pulling the same through the dies.

5. A method of making dies consisting in providing a sheetof paper on both sides With perfectly registering characters, coating these characters with resinous or other self hardening material, and heating the Whole.

6. Theherein described method of mak-i ring dies, comprising the printing of an inipression of the job on a pad secured to the bed of a printing press, covering said impression with a sheet of-paper, printing another impression of the job on the front face the printing or of the sheet in perfect register with the job printed on the pad, providing the rear face of the sheet with an impression of the job from the pad on the bed simultaneously with the front face, coating the impressions on both sides of the sheet with a resinous material, heating the sheets for letting the Wet imprints to rise, hardening the raised imprints, and finally combining a number of superposed sheets made by the same method to constitute a male die of a size required by the j 0b. I

' In testimony whereof I affix my signature.

ARTHUR L; SMITH. 

